> if the judge says that the transaction must be reversed, you get it reversed, even if that means delivering cash in briefcases or something like that

So if I pay cash for something, I can get it back if a judge orders the counterparty to do so.

Why is cryptocurrency not the same? Can I not go to a court and get an order, exactly the same?

Of course I may not know the counterparty's identity or they may be in a hostile jurisdiction, but how is that different to cash that has escaped my jurisdiction?